From 17c34c566795ca7529cf888fb33fdb7997d6b202 Mon Sep 17 00:00:00 2001 From: Peter De Schrijver Date: Tue, 21 Mar 2017 12:16:26 +0200 Subject: [PATCH] clk: aggregate return codes of notify chains In case there are multiple notify chains for the same clocks (because they were registered by different users), we need to propagate potential failure of any single one of them to the caller. Otherwise we eg risk violating the V/f curve when a notifier is used for DVFS. Signed-off-by: Peter De Schrijver Signed-off-by: Stephen Boyd Signed-off-by: Michael Turquette --- drivers/clk/clk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 0d8eb5a..cddddbe 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -966,6 +966,8 @@ static int __clk_notify(struct clk_core *core, unsigned long msg, cnd.clk = cn->clk; ret = srcu_notifier_call_chain(&cn->notifier_head, msg, &cnd); + if (ret & NOTIFY_STOP_MASK) + return ret; } } -- 2.7.4